import math    #导入math库
from math import sqrt , acos , cos

if __name__ == '__main__':
    print("helloword")# pythonon打印时不用加；
    studentName = "liuyutao"
    appearance = "headsome"
    other = "       qwer df    "
    print(studentName.title())# title()函数为将字符串首字母变为大写
    print(studentName.upper())
    print(studentName.lower())
    print(studentName + " is very " + appearance)
    print(other)
    print(other.rsplit())
    print(other.lstrip())
    print(other.strip())
    print(3.14/2.5)





# python数组


